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First, How can you know exactly how many bitcoins have been mined and how many are left to be mined in future?
Second, once all the 21,000,000 coins are mined, will the limit be expanded? I still do not understand (

First, How can you know exactly how many bitcoins have been mined and how many are left to be mined in future?
Second, once all the 21,000,000 coins are mined, will the limit be expanded? I still do not understand (

Hello, Missis CS!
There is a cool graph that shows the total amount Bitcoins in circulation:

The number 21M is a hardcoded limit and cannot be increased. Well, technically anyone can create a fork of Bitcoin with a total supply of let's say 42M or 100M coins but no one will use the fork and take it seriously.

First, How can you know exactly how many bitcoins have been mined and how many are left to be mined in future?
Second, once all the 21,000,000 coins are mined, will the limit be expanded? I still do not understand (

First, How can you know exactly how many bitcoins have been mined and how many are left to be mined in future?
Second, once all the 21,000,000 coins are mined, will the limit be expanded? I still do not understand (

Is there a limit on the issuance of bitcoins? How is it controlled?

Cryptographic currencies, such as Bitcoin, are generated using certain algorithms, and to achieve them, as well as to manage transactions, process power is needed. Putting your computer to work to create new blocks and approve transactions is what is known as mining Bitcoins.

According to a Cambridge University study, it was found that there were between 2.9 million and 5.8 million unique users of cryptocurrency wallets and more than 2,000 people working full time in the cryptocurrency industry, with the clarification that there were organizations, especially the largest ones dedicated to mining that did not disclose details about their payrolls.

According to CoinMarketCap, From March 2016 to March 2017, bitcoin goes from 86% to 80% of the total market value, while the Ethereum grew from 10% to 16% in the same period. Neither the authors of the study could foresee that in 8 months the total value of cryptocurrencies would grow 18 times, and it is interesting to observe how the extraordinary boom of bitcoin also results in a deterioration of its percentage weight that is today of 38.5%; Ethereum itself also decreases in percentage to 12.08%, which means that the rest of the cryptocurrencies reach a record of 50% compared to the two dominant ones.